package com.heima.search.service.impl;

import com.heima.model.common.dtos.ResponseResult;
import com.heima.model.common.enums.AppHttpCodeEnum;
import com.heima.model.search.dtos.UserSearchDto;
import com.heima.search.pojos.ApAssociateWords;
import com.heima.search.service.ApAssociateWordsService;
import org.apache.commons.lang3.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class ApAssociateWordsServiceImpl implements ApAssociateWordsService {

    @Autowired
    MongoTemplate mongoTemplate;

    /**
     * 联想词
     * @param dto
     * @return
     */
    @Override
    public ResponseResult findAssociate(UserSearchDto dto) {

        //1 参数检查
        if(dto == null || StringUtils.isBlank(dto.getSearchWords())){
            return ResponseResult.errorResult(AppHttpCodeEnum.PARAM_INVALID);
        }
        //分页检查
        if (dto.getPageSize() > 20) {
            dto.setPageSize(20);
        }

        // 搜索的关键词 到词库匹配
       List<ApAssociateWords> wordsList = mongoTemplate.find(
                Query.query(Criteria.where("associateWords").regex(".*?\\" +dto.getSearchWords()+ ".*"))
               .limit(dto.getPageSize()),
                ApAssociateWords.class);


        return ResponseResult.okResult(wordsList);
    }

}
